To provide a highly conductive and highly bendable copper alloy wire and a manufacturing method thereof suitably used for a driving cable conductor of robot.

This copper alloy wire comprises a chromium fiberreinforced copper formed or a copper alloy matrix complex material formed in situ. In this case, a wire rod is constituted by forming a chromium layer fiber in copper or a copper alloy matrix in situ. The wire surface is subjected to copper-plating at an intermediate stage of a manufacture step of the wire and the copper plating layer is reformed by applying a plastic processing and then, a heat treatment is applied to the copper in a nonoxidation atmosphere to release a machining distortion. An amount of the chromium layer fiber component is preferably 8-25 wt.%.